"By mapping the Texas Cretaceous strata over their full extent of exposure, subdividing the Lower Cretaceous into groups and formations which have since become standard, conducting the first scientific expedition down the Rio Grande through Big Bend country, establishing the basic physiographic divisions and the character of the Greater Texas Region, delineating and naming the Balcones Fault Zone, and discovering the westerly belt of faulting now known as the Texas Lineament, (Robert T.) Hill earned the title of 'Father of Texas Geology'"--Inside cover.